GHS Vs NAPA

I am a regular user of Maxsurf and I observe that important features like Grain Stability is not present there and report generation is not as smart as GHS or NAPA.
So I want to upgrade. In this case I want to know which one will be more user-friendly?
For Grain Stability is GHS enough?

It would be a waste of money....because the grain stability can be done with your existing software, but you need to do more manual calculation to lay over the results on the output from maxsurf.
A bit like the "old days" before computers!

So if you do one grain stability calculation per stability book per year...is it worth it...no.

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